.lesson-header[data-astro-cid-2caiwynt]{backdrop-filter:blur(10px);border:1px solid var(--border-primary);border-radius:var(--radius-xl);padding:var(--space-6);transition:var(--transition-all);box-shadow:var(--shadow-md)}.lesson-title[data-astro-cid-2caiwynt]{font-size:var(--text-3xl);font-weight:var(--font-bold);color:var(--text-primary);margin-bottom:var(--space-2);transition:var(--transition-all)}.lesson-description[data-astro-cid-2caiwynt]{color:var(--text-secondary);margin-bottom:var(--space-4);transition:var(--transition-all)}.lesson-meta[data-astro-cid-2caiwynt]{display:flex;flex-wrap:wrap;gap:var(--space-4);margin-top:var(--space-4)}.lesson-meta-item[data-astro-cid-2caiwynt]{display:flex;align-items:center;gap:var(--space-2);color:var(--text-secondary);font-size:var(--text-sm);transition:var(--transition-all);padding:var(--space-1) var(--space-2);border-radius:var(--radius-md)}.lesson-meta-icon[data-astro-cid-2caiwynt]{width:var(--space-4);height:var(--space-4);transition:var(--transition-all)}.lesson-meta-item[data-astro-cid-2caiwynt]:hover .lesson-meta-icon[data-astro-cid-2caiwynt]{transform:scale(1.2)}.progress-container[data-astro-cid-2caiwynt]{background:linear-gradient(135deg,#dd2b0e1a,#8b1a0a0d);padding:var(--space-4);border-radius:var(--radius-lg);transition:var(--transition-all)}.progress-text[data-astro-cid-2caiwynt]{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--text-primary);margin-bottom:var(--space-2);text-align:center;transition:var(--transition-all)}.progress-bar[data-astro-cid-2caiwynt]{width:var(--space-30);height:6px;background-color:var(--border-primary);border-radius:var(--radius-sm);overflow:hidden;transition:var(--transition-all)}.progress-container[data-astro-cid-2caiwynt]:hover .progress-bar[data-astro-cid-2caiwynt]{transform:scaleY(1.2)}.progress-fill[data-astro-cid-2caiwynt]{height:100%;background:linear-gradient(90deg,var(--accent-primary) 0%,#b91c1c 100%);border-radius:var(--radius-sm);transition:width .5s ease,var(--transition-transform);position:relative;overflow:hidden}.progress-fill[data-astro-cid-2caiwynt]:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:shimmer 2s infinite}.progress-container[data-astro-cid-2caiwynt]:hover .progress-fill[data-astro-cid-2caiwynt]{box-shadow:0 0 10px rgba(var(--accent-primary-rgb, 220, 38, 38),.5)}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}@media(max-width:768px){.lesson-header[data-astro-cid-2caiwynt]{padding:var(--space-4);margin-bottom:var(--space-6)}.lesson-title[data-astro-cid-2caiwynt]{font-size:var(--text-2xl)}.lesson-meta[data-astro-cid-2caiwynt]{gap:var(--space-3)}.progress-container[data-astro-cid-2caiwynt]{padding:var(--space-3)}.progress-bar[data-astro-cid-2caiwynt]{width:var(--space-25)}}.dark .lesson-header[data-astro-cid-2caiwynt]{background:rgba(var(--bg-card-rgb, 17, 24, 39),.8)}.dark .lesson-header[data-astro-cid-2caiwynt]:hover{background:rgba(var(--bg-card-rgb, 17, 24, 39),.9)}.dark .progress-container[data-astro-cid-2caiwynt]{background:rgba(var(--bg-secondary-rgb, 31, 41, 55),.6)}.dark .lesson-header[data-astro-cid-2caiwynt]:hover .progress-container[data-astro-cid-2caiwynt]{background:rgba(var(--bg-secondary-rgb, 31, 41, 55),.8)}.course-sidebar[data-astro-cid-zktg46hg]{background-color:var(--bg-card);border:1px solid var(--border-primary);border-radius:.75rem;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f;overflow:hidden;backdrop-filter:blur(8px)}.sidebar-header[data-astro-cid-zktg46hg]{padding:1rem 1.5rem;border-bottom:1px solid var(--border-primary);background-color:var(--bg-header);transition:all .2s ease}.course-sidebar[data-astro-cid-zktg46hg]:hover .sidebar-header[data-astro-cid-zktg46hg]{background-color:rgba(var(--accent-primary-rgb, 220, 38, 38),.05)}.sidebar-title[data-astro-cid-zktg46hg]{font-size:1.125rem;font-weight:600;color:var(--text-primary);margin:0}.course-sidebar[data-astro-cid-zktg46hg]:hover .sidebar-title[data-astro-cid-zktg46hg]{color:var(--accent-primary);transform:translate(2px)}.sidebar-subtitle[data-astro-cid-zktg46hg]{font-size:.875rem;color:var(--text-muted);margin:.25rem 0 0}.course-nav-list[data-astro-cid-zktg46hg]{max-height:24rem;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border-accent) var(--bg-tertiary)}.course-nav-list[data-astro-cid-zktg46hg]::-webkit-scrollbar{width:.375rem}.course-nav-list[data-astro-cid-zktg46hg]::-webkit-scrollbar-track{background:var(--bg-tertiary);border-radius:.25rem}.course-nav-list[data-astro-cid-zktg46hg]::-webkit-scrollbar-thumb{background:var(--border-accent);border-radius:.25rem;transition:all .2s ease}.course-nav-list[data-astro-cid-zktg46hg]::-webkit-scrollbar-thumb:hover{background:var(--accent-primary);box-shadow:0 0 8px rgba(var(--accent-primary-rgb, 220, 38, 38),.3)}.course-nav-item[data-astro-cid-zktg46hg]{border-bottom:1px solid var(--border-secondary);transition:background-color .2s}.course-nav-item[data-astro-cid-zktg46hg]:last-child{border-bottom:none}.course-nav-item[data-astro-cid-zktg46hg]:hover{background-color:var(--sidebar-item-hover);box-shadow:0 2px 8px #0000001a}.course-nav-item[data-astro-cid-zktg46hg].active{background-color:var(--sidebar-item-active);border-left:3px solid var(--accent-primary);transform:translate(2px);box-shadow:0 4px 12px rgba(var(--accent-primary-rgb, 220, 38, 38),.15)}.course-nav-link[data-astro-cid-zktg46hg]{display:block;padding:.75rem;color:inherit;text-decoration:none}.course-lesson-number[data-astro-cid-zktg46hg]{width:1.5rem;height:1.5rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:500;flex-shrink:0;transition:all .2s ease}.course-lesson-number[data-astro-cid-zktg46hg].current{background-color:var(--accent-primary);color:#fff}.course-lesson-number[data-astro-cid-zktg46hg].completed{background-color:var(--accent-success);color:#fff}.course-lesson-number[data-astro-cid-zktg46hg].default{background-color:var(--border-accent);color:var(--text-secondary)}.course-lesson-title[data-astro-cid-zktg46hg]{font-size:.875rem;font-weight:500;color:var(--text-primary);line-height:1.25;margin:0;transition:all .2s ease}.course-nav-item[data-astro-cid-zktg46hg]:hover .course-lesson-title[data-astro-cid-zktg46hg]{color:var(--accent-primary);transform:translate(2px)}.course-lesson-description[data-astro-cid-zktg46hg]{font-size:.75rem;color:var(--text-muted);margin-top:.25rem;line-height:1.25}.course-lesson-duration[data-astro-cid-zktg46hg]{font-size:.75rem;color:var(--text-dim);margin-top:.25rem}